تقييم تضييق الصمام التاجي باستخدام طريقة PISA للمرضى العراقيين بواسطة الايكو == Assessment of Mitral Valve stenosis by Simplifying proximal Isovelocity surface area in Iraqi Patients by Trans thoracic Echocardiography
Author name:
محمد جاسم حتروش
Supervisor name:
غازي فرحان حاجي
General topic:
Medicine
Specific topic:
Echocardiography
Degree:
Higher Diploma
University:
University of Baghdad - Faculty Of Medicine - Department Of Internal Medicine
Language:
English
University location:
Baghdad
First pages:
19T1280 - p.pdf
Abstract:
Background : Mitral Stenosis refers to narrowing of the mitral valve orifice, resulting in impairment of filling of the left ventricle in diastole. It is usually caused by rheumatic heart disease. Proximal isovelocity surface area measurement, also known as the “flow convergence” method, can be used in Transthoracic Echocardiography to estimate the area of an orifice through which blood flows.Objectives : To compare simple PISA equation, created by combined fixing the angle to 1000 and the Val to 33 cm/s, with mitral valve area measured by pressure half time and planimetry which was taken as reference method.Patients and Methods : A cross sectional prospective study was conducted in multi teaching centers (Baghdad teaching hospital, Ibin AL Nafees hospital, Ibn AL Bitar hospital and Ghazi AL Harriry teaching hospital) from the June 2015 to the June 2016. 104 patients were enrolled in this study, 41 were excluded from the study (patients with mild mitral stenosis, with aortic regurgitation, mitral regurgitation and those with poor window were excluded from the study). Transthoracic echocardiographic examination include para sternal long axis, apical four chamber and parasternal short axis view were used to analyze parameters were selected by M - mode, 2D, and pulse doppler Results : There were 63 patients enrolled in this study with a mean age of 45.4 ± 7.1years, (23.8%) of them within the age group 30 - 39 years and the remaining (76.2%) were > 40 years. Female patients were the dominant represented 73.0% while male were 7.0% of the studied group (female : male ratio was 3 : 1); (61.9%) were in sinus rhythm and (38.1%) in atrial fibrillation. 58.7% of the patients are with Wilkin's score less than8, the mean mitral valve area according to planimetry method was (1.14 ± 0.32) cm2 and it was (1.12 ± 0.28) cm2 by PISA while the mean mitral valve area by pressure half time method was (1.19 ± 0.30) cm2. The agreement between PISA and planimetry revealed that PISA had good agreement with planimetry in diagnosis of mitral stenosis, (kappa= 0.835, P< 0.001). On the other hand, there was a fair significant agreement between pressure half time and planimetry.Conclusions : PISA method can effectively predict mitral valve area and severity of mitral stenosis by the equation; mitral valve area = 115 _ r2/Vmax, Provided that aliasing velocity is fixed at 33 cm/s, with the advantage of easy calculation over other methods used to evaluate mitral valve area by Trans thoracic Echocardiography.
